Technical Specifications
Cameras:
– FLIR Blackfly S 24.5 MP, 2.74 um pixels (Color)
– FLIR Blackfly S 7.1 MP, 4.5 um pixels (BW / Fluorescence)
Imaging Lens – Telecentric objective; Dual-Path 0.185x Magnification up to 4/3” sensor
– 27 um optical resolution
– 14.8 um pixel size
– 22 mm depth of field for > 300 um objects
– 68 mm x 68 mm FOV with cropped IMX540 sensor
– Turning prism and second optical path
Illumination – Pulsed White LED, Darkfield
– Exposure Time – 70μs
– Color and IR Darkfield Illumination
– White 4500 K 32x LEDs, 30,000 lumen
– Near-IR 810 nm 32x LEDs, 16 W optical
– 80% diffuser with 12 mm Darkfield spot
– 3x 125 mm focal length PCX Lenses
Fluorescence Illumination:
– 400 nm to 420 nm 2x 32x LEDs, 44W optical
– 28 deg secondary optics, 80% efficiency
– Short pass filter > OD 3 above 441 nm
– Fresnel lens, 140 mm focal length
Key Attributes
– Safe working depth 500 m, anodized aluminum housing, acrylic viewports
– Multimodal illumination providing: color, near-IR, and fluorescence
– Detection range: 90 um to 60 mm
– Identification range: 350 um to 60 mm
– Onboard data reduction and 4 TB of storage (150k raw images, > 10 million ROIs)
– Imaging up to 1 liter per second with 30 um optical resolution
– 15 frames per second
– ROI extraction and full-frame recording
The image to the right shows the 1951 USAF resolution test chart as recorded by the VIOLET’s color camera. The chart features groups of line-pairs of increasing spatial frequency (decreasing distance between bars). The image shows groups 2 through 5 are being resolved by the camera with Group 3, element 6 being the spatial frequency at which the camera is no longer able to resolve the bars with sufficient (<20%) contrast. Group 3, Element 2 corresponds to a spatial frequency of 8.98 line-pairs-per-millimeter (lp/mm).
